error = "Error Domain=com.a

AFNetworking请求数据时经常出现这类错误，错误码是-1016，这里的关键是Request failed: unacceptable content-type: application/javascript，有的会出现Request failed: unacceptable content-type: text/html，也就是数据解析的问题，在session.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/plain", @"text/javascript", @"text/json", @"text/html",@"application/javascript" ,nil];中加上缺失的类型就行，记录以以提醒自己。